when changing the AudioOutput for the VolumeSlider update the widgets according to the properties of the new AudioOutput
when changing the AudioOutput for the VolumeSlider update the widgets according
to the properties of the new AudioOutput

svn path=/trunk/KDE/kdelibs/phonon/; revision=723277

sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc,sandsmark/phonon-visualization-gsoc